Preparation
5-Phenyl-2-amino-benzensulfonic acid diazo, and 5-Amino-7-ehtoxy-2-naphthalenesulfonic acid coupling, product to diazo, and 4-Formamido-5-hydroxynaphthalene-2,7-disulfonic acid coupling (finally coupling is in Pyridine in water).
Properties and Applications
green. Soluble in water for blue light green, soluble in ethanol. The strong sulfuric acid for Gray light black, diluted green for blue-ray. The dye solution to join strong hydrochloric acid have olive green precipitation; Add thick sodium hydroxide solution to black purple precipitation.
Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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Fading
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Stain
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Fading
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Stain
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ISO
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4
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3
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3
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1-2
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1-2
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